static Frac cal(int i, int j)
{
long x = a[i].x * a[j].x + a[i].y * a[j].y,
y = a[i].x * a[i].x + a[i].y * a[i].y,
z = a[j].x * a[j].x + a[j].y * a[j].y;
Frac ans = new Frac();
ans.fz = x * x;
ans.fm = y * z;
if (x < 0)
{
ans.fz = -ans.fz;
}
return(ans);
}
public Program(string inputFile, string outputFile)
{
io = new IOHelper(inputFile, outputFile, Encoding.Default);
int n = io.NextInt();
a = new Vect[n];
for (int i = 0; i < n; i++)
{
a[i] = new Vect();
int x = io.NextInt();
int y = io.NextInt();
a[i].x = x; a[i].y = y; a[i].p = i + 1;
if (x >= 0 && y >= 0)
{
a[i].t = 0;
}
else if (x < 0 && y > 0)
{
a[i].t = 1;
}
else if (x <= 0 && y <= 0)
{
a[i].t = 2;
}
else
{
a[i].t = 3;
}
}
Array.Sort(a);
int ansx = a[0].p, ansy = a[n - 1].p;
Frac best = cal(0, n - 1);
for (int i = 0; i < n - 1; i++)
{
Frac now = cal(i, i + 1);
if (now > best)
{
ansx = a[i].p; ansy = a[i + 1].p;
best = now;
}
}
io.WriteLine(ansx + " " + ansy);
io.Dispose();
}